Laboratory apparatus



FIG. 1 is a front perspective view of a laboratory apparatus showing our design;

FIG. 2 is a top view thereof; and,

FIG. 3 is a left side view thereof, the right side is a mirror image of the left side.

The broken lines shown in the figures represent portions of the laboratory apparatus that form no part of the claimed design. 

The ornamental design for a laboratory apparatus, as shown and described. 